Index: sdk/lib/_internal/compiler/js_lib/math_patch.dart |
diff --git a/sdk/lib/_internal/compiler/js_lib/math_patch.dart b/sdk/lib/_internal/compiler/js_lib/math_patch.dart |
deleted file mode 100644 |
index 0a4370873ec4a974c22d11ee1cfb5082677e9c3e..0000000000000000000000000000000000000000 |
--- a/sdk/lib/_internal/compiler/js_lib/math_patch.dart |
+++ /dev/null |
@@ -1,238 +0,0 @@ |
-// Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file |
-// for details. All rights reserved. Use of this source code is governed by a |
-// BSD-style license that can be found in the LICENSE file. |
- |
-// Patch file for dart:math library. |
-import 'dart:_foreign_helper' show JS; |
-import 'dart:_js_helper' show patch, checkNum; |
- |
-@patch |
-double sqrt(num x) |
- => JS('double', r'Math.sqrt(#)', checkNum(x)); |
- |
-@patch |
-double sin(num x) |
- => JS('double', r'Math.sin(#)', checkNum(x)); |
- |
-@patch |
-double cos(num x) |
- => JS('double', r'Math.cos(#)', checkNum(x)); |
- |
-@patch |
-double tan(num x) |
- => JS('double', r'Math.tan(#)', checkNum(x)); |
- |
-@patch |
-double acos(num x) |
- => JS('double', r'Math.acos(#)', checkNum(x)); |
- |
-@patch |
-double asin(num x) |
- => JS('double', r'Math.asin(#)', checkNum(x)); |
- |
-@patch |
-double atan(num x) |
- => JS('double', r'Math.atan(#)', checkNum(x)); |
- |
-@patch |
-double atan2(num a, num b) |
- => JS('double', r'Math.atan2(#, #)', checkNum(a), checkNum(b)); |
- |
-@patch |
-double exp(num x) |
- => JS('double', r'Math.exp(#)', checkNum(x)); |
- |
-@patch |
-double log(num x) |
- => JS('double', r'Math.log(#)', checkNum(x)); |
- |
-@patch |
-num pow(num x, num exponent) { |
- checkNum(x); |
- checkNum(exponent); |
- return JS('num', r'Math.pow(#, #)', x, exponent); |
-} |
- |
-const int _POW2_32 = 0x100000000; |
- |
-@patch |
-class Random { |
- @patch |
- factory Random([int seed]) => |
- (seed == null) ? const _JSRandom() : new _Random(seed); |
-} |
- |
-class _JSRandom implements Random { |
- // The Dart2JS implementation of Random doesn't use a seed. |
- const _JSRandom(); |
- |
- int nextInt(int max) { |
- if (max <= 0 || max > _POW2_32) { |
- throw new RangeError("max must be in range 0 < max ≤ 2^32, was $max"); |
- } |
- return JS("int", "(Math.random() * #) >>> 0", max); |
- } |
- |
- /** |
- * Generates a positive random floating point value uniformly distributed on |
- * the range from 0.0, inclusive, to 1.0, exclusive. |
- */ |
- double nextDouble() => JS("double", "Math.random()"); |
- |
- /** |
- * Generates a random boolean value. |
- */ |
- bool nextBool() => JS("bool", "Math.random() < 0.5"); |
-} |
- |
- |
-class _Random implements Random { |
- // Constants used by the algorithm or masking. |
- static const double _POW2_53_D = 1.0 * (0x20000000000000); |
- static const double _POW2_27_D = 1.0 * (1 << 27); |
- static const int _MASK32 = 0xFFFFFFFF; |
- |
- // State comprised of two unsigned 32 bit integers. |
- int _lo = 0; |
- int _hi = 0; |
- |
- // Implements: |
- // uint64_t hash = 0; |
- // do { |
- // hash = hash * 1037 ^ mix64((uint64_t)seed); |
- // seed >>= 64; |
- // } while (seed != 0 && seed != -1); // Limits for pos/neg seed. |
- // if (hash == 0) { |
- // hash = 0x5A17; |
- // } |
- // _lo = hash & _MASK_32; |
- // _hi = hash >> 32; |
- // and then does four _nextState calls to shuffle bits around. |
- _Random(int seed) { |
- int empty_seed = 0; |
- if (seed < 0) { |
- empty_seed = -1; |
- } |
- do { |
- int low = seed & _MASK32; |
- seed = (seed - low) ~/ _POW2_32; |
- int high = seed & _MASK32; |
- seed = (seed - high) ~/ _POW2_32; |
- |
- // Thomas Wang's 64-bit mix function. |
- // http://www.concentric.net/~Ttwang/tech/inthash.htm |
- // via. http://web.archive.org/web/20071223173210/http://www.concentric.net/~Ttwang/tech/inthash.htm |
- |
- // key = ~key + (key << 21); |
- int tmplow = low << 21; |
- int tmphigh = (high << 21) | (low >> 11); |
- tmplow = (~low & _MASK32) + tmplow; |
- low = tmplow & _MASK32; |
- high = (~high + tmphigh + ((tmplow - low) ~/ 0x100000000)) & _MASK32; |
- // key = key ^ (key >> 24). |
- tmphigh = high >> 24; |
- tmplow = (low >> 24) | (high << 8); |
- low ^= tmplow; |
- high ^= tmphigh; |
- // key = key * 265 |
- tmplow = low * 265; |
- low = tmplow & _MASK32; |
- high = (high * 265 + (tmplow - low) ~/ 0x100000000) & _MASK32; |
- // key = key ^ (key >> 14); |
- tmphigh = high >> 14; |
- tmplow = (low >> 14) | (high << 18); |
- low ^= tmplow; |
- high ^= tmphigh; |
- // key = key * 21 |
- tmplow = low * 21; |
- low = tmplow & _MASK32; |
- high = (high * 21 + (tmplow - low) ~/ 0x100000000) & _MASK32; |
- // key = key ^ (key >> 28). |
- tmphigh = high >> 28; |
- tmplow = (low >> 28) | (high << 4); |
- low ^= tmplow; |
- high ^= tmphigh; |
- // key = key + (key << 31); |
- tmplow = low << 31; |
- tmphigh = (high << 31) | (low >> 1); |
- tmplow += low; |
- low = tmplow & _MASK32; |
- high = (high + tmphigh + (tmplow - low) ~/ 0x100000000) & _MASK32; |
- // Mix end. |
- |
- // seed = seed * 1037 ^ key; |
- tmplow = _lo * 1037; |
- _lo = tmplow & _MASK32; |
- _hi = (_hi * 1037 + (tmplow - _lo) ~/ 0x100000000) & _MASK32; |
- _lo ^= low; |
- _hi ^= high; |
- } while (seed != empty_seed); |
- |
- if (_hi == 0 && _lo == 0) { |
- _lo = 0x5A17; |
- } |
- _nextState(); |
- _nextState(); |
- _nextState(); |
- _nextState(); |
- } |
- |
- // The algorithm used here is Multiply with Carry (MWC) with a Base b = 2^32. |
- // http://en.wikipedia.org/wiki/Multiply-with-carry |
- // The constant A (0xFFFFDA61) is selected from "Numerical Recipes 3rd |
- // Edition" p.348 B1. |
- |
- // Implements: |
- // var state = (A * _lo + _hi) & _MASK_64; |
- // _lo = state & _MASK_32; |
- // _hi = state >> 32; |
- void _nextState() { |
- // Simulate (0xFFFFDA61 * lo + hi) without overflowing 53 bits. |
- int tmpHi = 0xFFFF0000 * _lo; // At most 48 bits of significant result. |
- int tmpHiLo = tmpHi & _MASK32; // Get the lower 32 bits. |
- int tmpHiHi = tmpHi - tmpHiLo; // And just the upper 32 bits. |
- int tmpLo = 0xDA61 * _lo; |
- int tmpLoLo = tmpLo & _MASK32; |
- int tmpLoHi = tmpLo - tmpLoLo; |
- |
- int newLo = tmpLoLo + tmpHiLo + _hi; |
- _lo = newLo & _MASK32; |
- int newLoHi = newLo - _lo; |
- _hi = ((tmpLoHi + tmpHiHi + newLoHi) ~/ _POW2_32) & _MASK32; |
- assert(_lo < _POW2_32); |
- assert(_hi < _POW2_32); |
- } |
- |
- int nextInt(int max) { |
- if (max <= 0 || max > _POW2_32) { |
- throw new RangeError("max must be in range 0 < max ≤ 2^32, was $max"); |
- } |
- if ((max & (max - 1)) == 0) { |
- // Fast case for powers of two. |
- _nextState(); |
- return _lo & (max - 1); |
- } |
- |
- int rnd32; |
- int result; |
- do { |
- _nextState(); |
- rnd32 = _lo; |
- result = rnd32.remainder(max); // % max; |
- } while ((rnd32 - result + max) >= _POW2_32); |
- return result; |
- } |
- |
- double nextDouble() { |
- _nextState(); |
- int bits26 = _lo & ((1 << 26) - 1); |
- _nextState(); |
- int bits27 = _lo & ((1 << 27) - 1); |
- return (bits26 * _POW2_27_D + bits27) / _POW2_53_D; |
- } |
- |
- bool nextBool() { |
- _nextState(); |
- return (_lo & 1) == 0; |
- } |
-} |